Automatic-valve.



E. V. ANDERSON.

AUTOMATIC VALVE. APPLICATION FILED 0oT.1s, 1911.

Patented Nov. 4, 1913.

v w n naar EDWARD V. ANDERSON, OF MONESSON, PENNSYLVANIA, ASSIGNOR OFONE-'HALF T0 CHARLES E. GOLDEN, OF GRAFTON, PENNSYLVANIA.

AUTOMATIC VALVE.

To all 'tc/om t may conce/m.'

Be it known that l, EDWARD V. AnnansoN, a citizen of the United States,residing at Monesson, in the State of Pennsylvania, have invented acertain new and Yuseful Automatic Valve, of which the following is aspecification.

My invention relates generally to throttle valves, and more especiallyto valves arranged to automatically closeby disturbing the equilibriumof pressure existing in its normal open condition, and its primaryobject is to produce an automatic self closing valve operable over adistance by release of pressure, to provide an easy opening and selfclosing valve, and to generally improve the construction and operationof valves. 4

In the accompanying drawing Figure l is a central vertical section ofthe valve and Fig. 2 is an end elevation of the same and of the exhaustor pilot valve device, the view being partly in section. Fig. 3represents the section of an engine shaft and the relative location ofthe pilot valve for certain purposes.

Heretofore it has been customary to handle throttle valves either byhand, or else by a governor of an engine which gradually closes thevalve, whereas my invent-ion provides means for automatically closingthe valve when the speedof the engine exceeds a certain desired limitand meantime leaves the valve opening free. Also it has been customaryheretofore to use, for throttling, the main valve itself, whereas Iprovide a quick acting auxiliary throttle device separate from the mainvalve. Incidentally, I provide means for operating the throttle valveeither by air pressure or electricity from any distance desired andattain other advantages hereinafter set forth.

Thus in the drawing, I show for illustration a throttle valve for steamengines. The valve casing 4l has an inlet (5) and an outlet (6) on thetwo sides of a separating web 7 which has a seating ring 8 with twovalve seating surfaces. The main valve 9 seats on the inner conicalsurface of S, and is carried loosely on a stem 10 by head 10, normallyheld in downward position against spring 11, and operated by handwheel12, being provided with a screw passing through the nut 13 in the hoodLl. At the same time the spring l1 holds in normal raised Specificationof Letters Patent.

Application led October 18, 1911.

Patented Nov. a, 1913. Serial N o. 655,434.

position the supplementary valve 15 which lits snugly in a jacket 16 andin raised positlon uncovers the small port 17, which however isprevented from communication with the outlet side of the main valve bythe head 10GL of the valve stem. The auxihary valve 15 is provided withan enlarged lia'nge 15EL riding in an enlargement of the Jacket 16, sothat together the two provide a space or chamber 19 under the flange15a. This chamber communicates through port l5b with the chamber' 1S inthe head and this chamber communicates by passage 2O with the inlet sideof the valve. Normally the valve in closed position is as shown in Fig.l. Upon opening it the first action is to lift the head l0a on thespindle and allow leakage through the port 17 to the outlet side so asto make it easier to open the valve against the line pressure. As themain valve 9 is opened, the stem rising with the spring 11 raises theauxiliary valve 15 to the position shown. In this position of course thehead or flange 15a has line pressure equalized on the two sides byreason of the ports 2O and 15b, so that the auxiliary valve 15 is heldup by the spring. This valve 15 is adapted to seat on the outsideconical surface of the seating ring 8 and in case of emergency it may bequickly closed by exhausting the pressure in chamber 19 by way of port21, which is shown more clearly .in Fig. 2.

I have shown a convenient means for exhausting the chamber 19, by smallpilot valve 23 connected to the port 21 and being allowed to open to theair at 23a-whenever its Aem 241 is released by the lever 25 by raisin fthe trip 26. This may be either done by .land or as here shown inseveral ways automatically. In Fig. 3 the engine shaft 27, revolving inthe direction of the arrow carries a weight 28 on a spring arm 29, whosestrength may be regulated by spring 29a, and when the centrifugal forcechanges the position of the weight the pin 30 will strike the trippingdog 26 and release the lever 25. This allows the engine to be free tothe ordinary government and a throttle valve operated only when acertain desired speed is exeeded. In the form of Fig. 2,. I show .theretaining `arm 26a arranged to be moved downwardly upon exciting thesolenoid 30 by making the circuit at any convenient point at a distance,either by hand or automatically. Of course when the pilot valve isopened, the pressure escapes from the chamber 19 and the auxiliary valvecloses on its conical seat. In doing so it, in conjunction with the mainvalve, entraps uid Within its chamber and furnishes a cushion so thatthe valve cannot close too suddenly.

Having thus described my invention and illustrated its use, what I claimis the following:

A quick operating emergency valve comprising a casing having a doublevalve seat, a main and a supplementary valve e aging said seat and alsoengaging each ot er to form a cushion on closing the supplemental valve,means to normally maintain the supplemental valve under balancedpressure, a spring to support the Weight of the supplemental valve onthe main valve, a port adapted to control fluid pressure to close thesupplemental valve, a pilot valve controlling said port, and electricaldevices operable from a distance to trip said pilot valve in case ofemergency.

In testimony whereof I have hereunto signed my name in the presence ofthe two subscribed witnesses.

EDWARD V. ANDERSON.

Witnesses:

FREDK. STAUB, Jo. BAILY BROWN.

